Like others, I confused with the combine of Varnish + Nginx and Nginx alone on my server. But since I optimized new server with only Nginx, FastCGI Cache, Memcache. I’ve found a lot of talk about using Nginx with Varnish or not around the Internet. Isn’t Nginx enough?
The Quick Answer: I choosed Nginx alone without Varnish because I’ve found Varnish ~5% faster for small static files than Nginx but I will have to spend more time to maintaining and configuring it to works as I experct. It is not worth my effort!
This arctile will explain the reason that I don’t use Varnish with Nginx like Apache before.